As a tester we do black box testing. To do white box testing
we need to know coding. And the technique that we have to
apply in testing is positive and negative testing. Test
leads will let us know what kinds of testing we have perform.

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As a Tester how we choose black or white box testing
technique for a application?..

Can anyone give me the example of High Priority and High
severity defect. Please dont give me answers like Spelling
mistakes or logo missing something like that. Give me some
real time example from your application. Thanks in Advance.